Inductance and quality-factor evaluation of planar lumped inductors in a multilayer configuration

Author

Mahmoud, Samir F. ; Beyne, Eric

Author_Institution

Dept. of Electr. & Comput. Eng., Kuwait Univ., Safat, Kuwait

Volume

45

Issue

6

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

918

Lastpage

923

Abstract

Integral representations for the self and mutual inductance of planar loops on a multilayered structure are derived. The integrals are of the Sommerfeld type and can be easily evaluated under the quasi-static approximation which is validated by the small dimensions relative to a wavelength. Enhancement of loop inductance by inclusion of a magnetic layer is investigated. It is shown that such a layer can increase the inductance by a percentage which has the upper limit of [(μ_r-1)/(μ_r+1)]×100%, where μ_r is the relative permeability of the layer. A study is also made on the inductor quality factor (Q) as affected by losses caused by finite electrical conductivity of the magnetic layer and the underlying substrate

Keywords

Q-factor; inductance; inductors; integral equations; losses; Sommerfeld type; finite electrical conductivity; loop inductance; losses; magnetic layer; multilayer configuration; mutual inductance; planar lumped inductors; quality-factor evaluation; quasi-static approximation; relative permeability; self inductance; Coils; Conductivity; Inductance; Inductors; Magnetic multilayers; Magnetic separation; Microwave circuits; Nonhomogeneous media; Q factor; Strips;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.588602

Filename

588602